Home / 1,370.16-1,890-1,145.52

Finding the Fourth Proportional to 1,370.16, 1,890 and 1,145.52

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Solution

The fourth proportional to 1,370.16, 1,890 and 1,145.52 is: 1,580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.16 : 1,890 = 1,145.52 : x
  2. Step 2: Convert to fraction form
    1,370.16/1,890 = 1,145.52/x
  3. Step 3: Cross multiply
    1,370.16x = 1,890 × 1,145.52
  4. Step 4: Simplify right side
    1,370.16x = 2,165,032.80
  5. Step 5: Solve for x
    x = 2,165,032.80/1,370.16
  6. Step 6: Final answer
    x = 1,580.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.